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From Martynas L <martynas....@gmail.com>
Subject Re: Slower document retrieval in 8.7.0 comparing to 7.5.0
Date Fri, 22 Jan 2021 08:52:03 GMT
 Please see the sample at
https://drive.google.com/drive/folders/1ufVZXzkugBAFnuy8HLAY6mbPWzjknrfE

IndexGenerator - creates a dummy index.
IndexReader - retrieves documents - duration time with 7.5.0 version is
~2s, while ~6s with 8.7.0

Regards,
Martynas


On Thu, Jan 21, 2021 at 8:21 PM Rob Audenaerde <rob.audenaerde@gmail.com>
wrote:

> There is no attachment in the previous email that I can see? Maybe you can
> post it online?
>
> On Thu, Jan 21, 2021 at 4:54 PM Martynas L <martynas.sub@gmail.com> wrote:
>
> > Hello,
> >
> > Are there any comments on this issue?
> > If there is no workaround, we will be forced to rollback to the 7.5.0
> > version.
> >
> > Best regards,
> > Martynas
> >
> > On Tue, Jan 12, 2021 at 12:27 PM Martynas L <martynas.sub@gmail.com>
> > wrote:
> >
> > > Hi,
> > >
> > > Please see attached sample.
> > > IndexGenerator - creates a dummy index.
> > > IndexReader - retrieves documents - duration time with 7.5.0 version is
> > > ~2s, while ~6s with 8.7.0
> > >
> > > Regards,
> > > Martynas
> > >
> > > On Tue, Dec 22, 2020 at 3:23 PM Vincenzo D'Amore <v.damore@gmail.com>
> > > wrote:
> > >
> > >> I think it would be useful to have an example of a document and, if
> > >> possible, an example of query that takes too long.
> > >>
> > >> On Mon, Dec 21, 2020 at 1:47 PM Martynas L <martynas.sub@gmail.com>
> > >> wrote:
> > >>
> > >> > Hello,
> > >> >
> > >> > I am sorry for the delay.
> > >> >
> > >> > Not sure what you mean by "workload". We have a performance tests,
> > which
> > >> > started failing after upgrading to 8.7.0.
> > >> > So I just tried to query the index (built form the same source) to
> get
> > >> all
> > >> > documents and compare the performance with 7.5.0.
> > >> >
> > >> > Document "size" is a sum of all stored string lengths (3402519
> > >> documents):
> > >> >
> > >> > doc size 903 - 88s vs 22s
> > >> >
> > >> > doc size 36 (only one field loaded, used searcher.doc(docID,
> > >> > Collections.singleton("fieldName"))) - 78s vs 16s
> > >> >
> > >> > doc size 439 (some fields made not stored) - 46s vs 14.5s
> > >> >
> > >> > Best regards,
> > >> > Martynas
> > >> >
> > >> > On Fri, Dec 4, 2020 at 12:06 AM Adrien Grand <jpountz@gmail.com>
> > wrote:
> > >> >
> > >> > > Hello Martynas,
> > >> > >
> > >> > > There have indeed been changes related to stored fields in 8.7.
> What
> > >> does
> > >> > > your workload look like and how large are your documents on
> average?
> > >> > >
> > >> > > On Thu, Dec 3, 2020 at 3:04 PM Martynas L <martynas.sub@gmail.com
> >
> > >> > wrote:
> > >> > >
> > >> > > > Hi,
> > >> > > > We've migrated from 7.5.0 to 8.7.0 and find out that the
index
> > >> > > "searching"
> > >> > > > is significantly (4-5 times) slower in the latest version.
> > >> > > > It seems that
> > >> > > > org.apache.lucene.search.IndexSearcher#doc(int)
> > >> > > > is slower.
> > >> > > >
> > >> > > > Is it possible to have similar performance with 8.7.0?
> > >> > > >
> > >> > > > Best regards,
> > >> > > > Martynas
> > >> > > >
> > >> > >
> > >> > >
> > >> > > --
> > >> > > Adrien
> > >> > >
> > >> >
> > >>
> > >>
> > >> --
> > >> Vincenzo D'Amore
> > >>
> > >
> >
>

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